Harvest and Postharvest Care
A single mature hardy kiwi plant will can yield between 50 and 100 pounds of fruit, though 50 pounds is closer to the average. Hardy kiwi can be allowed to "vine ripen," at which time they will have about 18 to 25 percent sugar. At this time, a single harvest, rather than a selective one over several pickings, is acceptable. Unlike the other small fruits, hardy kiwi will "after ripen." Specifically, they can be harvested at a less-than-optimal ripeness (about 8 to 9 percent sugar) and then placed in storage to ripen. When picked in this manner and refrigerated, hardy kiwi will keep in a cooler for up to 2 months.
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